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  <script>
    // 计算[2, 6, 18, 15, 40] 中能被3整除的偶数的个数
    let arr = [2, 6, 18, 15, 40]
    let newArr = []
    for(let i = 0;i <arr.length;i++) {
      if(arr[i] % 3 ===0 && arr[i] % 2 ===0) {
        newArr.push(arr[i])
      }
    }
    document.write(newArr.length);
  </script>
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